The correct tire pressure for a vehicle is determined by the size and weight of the vehicle, the type of tires it uses, load hauled, and the type of driving the vehicle is intended for. The vehicle manufacturer places a tire inflation placard in each vehicle that gives the proper tire inflation pressures for that vehicle. This placard is located on the inside of the glove box door, inside the fuel-filler door, or on the driver’s side doorpost (depending upon manufacturer). Most manufacturers also list tire inflation levels in the owner’s manual.